<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="root"></div>
    <script src="./vue3基础源码/vue3.js"></script>
    <script>
        const app = Vue.createApp({
            data(){
                return {
                    dataValue:''
                }
            },
            methods:{
                handleValue(val){
                   const valnum = (+val);
                    if((typeof valnum ===  "number") &&  !isNaN(valnum)) {
                        this.dataValue=valnum;
                        this.dataValue > 10 ? alert("超出数量") : alert("数量合格");
                        this.dataValue = '';
                    }else {
                        alert("请输入数字");
                    }
                    
                }
            },
            template:`<test @input-eve="handleValue"/>`
        });
        app.component("test",{
            emits:["inputEve"],
            data(){
                return {
                    inputValue:''
                }
            },
            methods:{
                handleClick(){
                    this.$emit("inputEve",this.inputValue);
                    this.inputValue = '';
                }
            },
            template:
                        `
                            <input v-model="inputValue"/>
                            <button @click="handleClick">确认</button>
                        
                        `
        })

        const vm = app.mount("#root")
    </script>
</body>
</html>